Try saying that after a couple of beers! This is a sluice on the River Parrett - one of many flood measures controlling the water flow on the Somerset Levels. This one controls the outflow from the Parrett to the Sowy River carrying excess water to Kings Sedgemoor Drain
oh wow, I wouldn't even remember it let alone be able to say it - I just tried to say it out loud and I've only had coffee, and it sounded slurred (lucky I'm at home, imagine if I tried it in public!)
Nice image. The Dutch word sluis and your sluice are almost the same.